Type BA Bolts are low profile, high quailty, decorative head bolts designed to connect components at right angles or parallel. Head diameter matches BB, BW, I and JCN Joint Connectors. Shoulder is the same diameter as the JCN to allow through hole connection. Type BB Bolts are economical, low profile, high quality, decorative head bolts with the same head size as the Type BA Bolt but without the shoulder. Type BC Bolts are low profile, high quality, decorative bolts similar to Type BB Bolts but have smaller head diameter of .511" (13mm).